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Diffstat (limited to 'X11/Xregion.h')
| -rw-r--r-- | X11/Xregion.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/X11/Xregion.h b/X11/Xregion.h new file mode 100644 index 000000000..1ae16c487 --- /dev/null +++ b/X11/Xregion.h @@ -0,0 +1,191 @@ +/************************************************************************
+
+Copyright 1987, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+************************************************************************/
+
+#ifndef _X11_XREGION_H_
+#define _X11_XREGION_H_
+
+typedef struct {
+ short x1, x2, y1, y2;
+} Box, BOX, BoxRec, *BoxPtr;
+
+typedef struct {
+ short x, y, width, height;
+}RECTANGLE, RectangleRec, *RectanglePtr;
+
+#define TRUE 1
+#define FALSE 0
+#ifndef MAXSHORT
+#define MAXSHORT 32767
+#define MINSHORT -MAXSHORT
+#endif
+#ifndef MAX
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+
+/*
+ * clip region
+ */
+
+typedef struct _XRegion {
+ long size;
+ long numRects;
+ BOX *rects;
+ BOX extents;
+} REGION;
+
+/* Xutil.h contains the declaration:
+ * typedef struct _XRegion *Region;
+ */
+
+/* 1 if two BOXs overlap.
+ * 0 if two BOXs do not overlap.
+ * Remember, x2 and y2 are not in the region
+ */
+#define EXTENTCHECK(r1, r2) \
+ ((r1)->x2 > (r2)->x1 && \
+ (r1)->x1 < (r2)->x2 && \
+ (r1)->y2 > (r2)->y1 && \
+ (r1)->y1 < (r2)->y2)
+
+/*
+ * update region extents
+ */
+#define EXTENTS(r,idRect){\
+ if((r)->x1 < (idRect)->extents.x1)\
+ (idRect)->extents.x1 = (r)->x1;\
+ if((r)->y1 < (idRect)->extents.y1)\
+ (idRect)->extents.y1 = (r)->y1;\
+ if((r)->x2 > (idRect)->extents.x2)\
+ (idRect)->extents.x2 = (r)->x2;\
+ if((r)->y2 > (idRect)->extents.y2)\
+ (idRect)->extents.y2 = (r)->y2;\
+ }
+
+/*
+ * Check to see if there is enough memory in the present region.
+ */
+#define MEMCHECK(reg, rect, firstrect){\
+ if ((reg)->numRects >= ((reg)->size - 1)){\
+ (firstrect) = (BOX *) Xrealloc \
+ ((char *)(firstrect), (unsigned) (2 * (sizeof(BOX)) * ((reg)->size)));\
+ if ((firstrect) == 0)\
+ return(0);\
+ (reg)->size *= 2;\
+ (rect) = &(firstrect)[(reg)->numRects];\
+ }\
+ }
+
+/* this routine checks to see if the previous rectangle is the same
+ * or subsumes the new rectangle to add.
+ */
+
+#define CHECK_PREVIOUS(Reg, R, Rx1, Ry1, Rx2, Ry2)\
+ (!(((Reg)->numRects > 0)&&\
+ ((R-1)->y1 == (Ry1)) &&\
+ ((R-1)->y2 == (Ry2)) &&\
+ ((R-1)->x1 <= (Rx1)) &&\
+ ((R-1)->x2 >= (Rx2))))
+
+/* add a rectangle to the given Region */
+#define ADDRECT(reg, r, rx1, ry1, rx2, ry2){\
+ if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&\
+ CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\
+ (r)->x1 = (rx1);\
+ (r)->y1 = (ry1);\
+ (r)->x2 = (rx2);\
+ (r)->y2 = (ry2);\
+ EXTENTS((r), (reg));\
+ (reg)->numRects++;\
+ (r)++;\
+ }\
+ }
+
+
+
+/* add a rectangle to the given Region */
+#define ADDRECTNOX(reg, r, rx1, ry1, rx2, ry2){\
+ if ((rx1 < rx2) && (ry1 < ry2) &&\
+ CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\
+ (r)->x1 = (rx1);\
+ (r)->y1 = (ry1);\
+ (r)->x2 = (rx2);\
+ (r)->y2 = (ry2);\
+ (reg)->numRects++;\
+ (r)++;\
+ }\
+ }
+
+#define EMPTY_REGION(pReg) pReg->numRects = 0
+
+#define REGION_NOT_EMPTY(pReg) pReg->numRects
+
+#define INBOX(r, x, y) \
+ ( ( ((r).x2 > x)) && \
+ ( ((r).x1 <= x)) && \
+ ( ((r).y2 > y)) && \
+ ( ((r).y1 <= y)) )
+
+/*
+ * number of points to buffer before sending them off
+ * to scanlines() : Must be an even number
+ */
+#define NUMPTSTOBUFFER 200
+
+/*
+ * used to allocate buffers for points and link
+ * the buffers together
+ */
+typedef struct _POINTBLOCK {
+ XPoint pts[NUMPTSTOBUFFER];
+ struct _POINTBLOCK *next;
+} POINTBLOCK;
+
+#endif /* _X11_XREGION_H_ */
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